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Subject: Re: Analysis help ...

Author: Dann Corbit

Date: 21:36:45 07/30/04

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On July 30, 2004 at 13:54:15, Jim Monaghan wrote:

>Hi,
>
>I would like some analysis help from the group with those of you with fast
>machines. I've posted 4 positions below in pgn format so you can simply copy and
>paste into your favourite engine. If you go up and down the solution tree you
>might spot a "hole" in the solution. My machine is simply too slow. The
>positions are fairly intricate. Thanks in advance.
[snip]
>Interesting knight sac with the BK blocked in and weak dark squares.
>
>[D]2rq1rk1/pp1bnpbp/4p1p1/3pP1N1/3P2Q1/2PB4/P4PPP/R1B1R1K1 w - -
>
>[Event "?"]
>[Site "?"]
>[Date "0000.??.??"]
>[Round "?"]
>[White "IQ.1031"]
>[Black "?"]
>[Result "*"]
>[SetUp "1"]
>[FEN "2rq1rk1/pp1bnpbp/4p1p1/3pP1N1/3P2Q1/2PB4/P4PPP/R1B1R1K1 w - -"]
>
>1. Nxh7 Kxh7 2. Qh4+ Kg8 3. Bg5 Re8 4. Re3 Rxc3 5. Rh3 Rxd3
>6. Qh7+ Kf8 7. Bf6 Nf5 8. Qh8+ *

Shredder 7.04 finds this one on ply 18:

2) Nxh7; id "JM-knight
    Searching move: Ng5xh7
    Best move (Shredder 7.04 UCI): Ng5xh7
    identical moves! Found in: 10:23

   illegal command
    2   00:00  0.65   Qg4h4 h7h5
    3-  00:00  0.35   Qg4h4 h7h6 Bc1a3 h6xg5 Ba3xe7 g5xh4 Be7xd8
    3   00:00 -0.04   Qg4h4 h7h6 Ng5f3 Rc8xc3
    3   00:00  0.04   Qg4f4 Rc8xc3 Qf4h4
    3+  00:00  0.05   Bc1a3 Qd8e8 Ba3xe7 Qe8xe7
    3+  00:00  0.45   Bc1a3 Bg7h8 Ba3xe7 Qd8xe7
    3   00:00  0.45   Bc1a3 Rc8xc3 Bd3xg6 Rc3xa3 Bg6xf7+ Rf8xf7 Ng5xf7
    3   00:00  0.62   Bc1d2 h7h6
    4   00:00  0.62   Bc1d2 h7h6
    5   00:00  0.62   Bc1d2 h7h6
    6   00:00  0.62   Bc1d2 h7h6
    7   00:00  0.62   Bc1d2 h7h6
    8   00:00  0.62   Bc1d2 h7h6
    9   00:00  0.62   Bc1d2 h7h6
   10   00:00  0.62   Bc1d2 h7h6
   11   00:01  0.62   Bc1d2 h7h6 Ng5f3
   12   00:01  0.62   Bc1d2 h7h6 Ng5f3 Ne7f5 Bd3xf5 e6xf5
   13   00:03  0.62   Bc1d2 h7h6 Ng5f3 Ne7f5 Bd3xf5 e6xf5 Ra1b1 f5xg4
   14   00:07  0.62   Bc1d2 h7h6 Qg4h5
   15   00:14  0.62   Bc1d2 h7h6 Ng5xe6 Bd7xe6 Qg4xg6 f7xg6
   16   00:26  0.62   Bc1d2 h7h6 Ng5xe6 Bd7xe6
   17   02:55  0.65   Bc1d2 h7h6 Ng5f3 Ne7f5 Ra1b1 b7b6 Qg4h3 h6h5 Bd2g5 Qd8c7
Rb1c1 b6b5 Bd3xf5 e6xf5 Bg5f6 Bg7h6 Nf3g5 Qc7c4
   18   07:06  0.68   Bc1d2 h7h6 Ng5f3 Ne7f5 Ra1b1 b7b6 Qg4h3 h6h5 Bd3a6 Rc8b8
Bd2g5 Qd8c7 Nf3h4 Nf5xh4 Qh3f3 Nh4xf3+
   18+  10:23  0.69   Ng5xh7 Kg8xh7 Qg4h4+ Kh7g8 Bc1g5 Rf8e8 Re1e3 a7a6
   18+  12:06  1.04   Ng5xh7 Kg8xh7 Qg4h4+ Kh7g8 Bc1g5 Rf8e8 Re1e3 a7a6 Re3h3
Kg8f8 Qh4h7 Rc8a8 c3c4 Ra8c8 Bg5h6 Ne7f5 Bh6xg7+ Nf5xg7 Qh7h8+ Kf8e7 Qh8xg7
Rc8xc4
   7/30/2004 9:35:11 PM, Time for this analysis: 00:16:39, Rated time: 27:02




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